Their trade is treachery - Central Office of Information

In the early 1960s, various UK government committees made recommendations on how to begin combatting what it perceived to be the growing threat to the UK from the Cold War spy armies. Perhaps the most famous outcome was the 'For Official Use Only' booklet produced for Civil Servants and the Armed Forces, now reproduced for the first time since 1964, Their Trade is Treachery gives a fascinating glimpse into the world of secrecy, paranoia and betrayal that was the British Civil Service during the height of the Cold War.